class AuthSOA(pypacker.Packet):
"""
Auth type SOA.
Not used atm
"""
__hdr__ = (("name", "H", 0), ("type", "H", 0), ("cls", "H", 0),
("ttl", "I", 0), ("dlen", "H", 0),
("name2", None, b"\x03www\x04test\x03com\x00"),
("mailbox", None,
b"\x03www\x04test\x03com\x00"), ("pserver", "H", 0),
("mbox", "H", 0), ("serial", "H", 0), ("refresh", "H", 0),
("retry", "H", 0), ("expire", "H", 0), ("minttl", "H", 0))
name_s = pypacker.get_property_dnsname("name")
mailbox_s = pypacker.get_property_dnsname("mailbox")
def _dissect(self, buf):
# set format
# find server name by 0-termination
idx = buf.find(b"\x00", 12)
# logger.debug(buf[12: idx+1])
# don't add trailing \0
self.name = buf[12:idx + 1]
# logger.debug("name: %s" % buf[idx + 1: -14])
self.mailbox = buf[idx + 1:-14]
return len(buf)
class Auth(pypacker.Packet):
"""Auth, generic type."""
__hdr__ = (
("name", "H", 0),
("type", "H", 0),
("cls", "H", 0),
("ttl", "I", 0),
(
"dlen", "H", 0
), # length of the rest of header: server + x, x becmoes body content
("server", None, b"\x03www\x04test\x03com\x00")
# TODO: add fields for mailbox, serial, refresh etc.
)
server_s = pypacker.get_property_dnsname("server")
def _dissect(self, buf):
# needed set format
# find server name by 0-termination
idx = buf.find(b"\x00", 12)
if idx == -1:
idx = len(buf)
self.server = buf[12:idx + 1]
# logger.debug("server: %s" % self.server)
return idx + 1
class Auth(pypacker.Packet):
"""Auth, generic type."""
__hdr__ = (
("name", "H", 0),
("type", "H", 0),
("cls", "H", 0),
("ttl", "I", 0),
(
"dlen", "H", 0
), # length of the rest of header: server + x, x becmoes body content
("server", None, b"\x03www\x04test\x03com\x00"))
server_s = pypacker.get_property_dnsname(
"server", cb_mc_bytes=get_bts_for_msg_compression)
def _dissect(self, buf):
# Needed set format
# Find server name by 0-termination
off_end = buf.find(b"\x00", 12)
if off_end == -1:
off_end = len(buf)
else:
off_end += 1
self.server = buf[12:off_end]
#logger.debug("server: %s" % self.server)
return off_end
class Query(pypacker.Packet):
"""DNS question."""
__hdr__ = (("name", None, b"\x03www\x04test\x03com\x00"),
("type", "H", DNS_A), ("cls", "H", DNS_IN))
name_s = pypacker.get_property_dnsname("name")
def _dissect(self, buf):
q_end = DNS.get_dns_length(buf)
self.name = buf[:q_end]
#logger.debug("val / format: %s %s" % (self._name, self._name_format))
return len(buf) # name (including 0) + type + cls
class Answer(MessageCompression):
"""DNS resource record."""
__hdr__ = (
("name", None, b"\xc0\x0c"),
("type", "H", DNS_A),
("cls", "H", DNS_IN),
("ttl", "I", 180),
("dlen", "H", 4), # length of the next field
("address", None, b"1234") # eg IPv4
)
name_s = pypacker.get_property_dnsname("name")
address_s = pypacker.get_property_dnsname("address")
def _dissect(self, buf):
name_end = DNS.get_dns_length(buf)
self.name = buf[:name_end]
# needed set format
start = name_end + 8
addr_len = unpack_H(buf[start:start + 2])[0]
self.address = buf[start + 2:start + 2 + addr_len]
# logger.debug("address: %s" % self.address)
return start + 2 + addr_len
class Answer(pypacker.Packet):
"""DNS resource record."""
__hdr__ = (
("name", None, b"\xc0\x0c"),
("type", "H", DNS_A),
("cls", "H", DNS_IN),
("ttl", "I", 180),
("dlen", "H", 4), # length of the next field
("address", None, b"1234") # eg IPv4
)
name_s = pypacker.get_property_dnsname(
"name", cb_mc_bytes=get_bts_for_msg_compression)
def _get_address_readable(self):
if self.type == DNS_A:
return pypacker.ip4_bytes_to_str(self.address)
elif self.type == DNS_AAAA:
return pypacker.ip6_bytes_to_str(self.address)
elif self.type == DNS_CNAME:
return pypacker.dns_name_decode(self.address)
else:
# Unknown type
return ""
address_s = property(_get_address_readable)
def _dissect(self, buf):
name_end = DNS.get_dns_length(buf)
self.name = buf[:name_end]
# needed set format
start = name_end + 8
addr_len = unpack_H(buf[start:start + 2])[0]
self.address = buf[start + 2:start + 2 + addr_len]
#logger.debug("address: %s" % self.address)
return start + 2 + addr_len
